Let
x-------> the number
we know that
Twice a number (x) is less than [tex] 10 [/tex]
so
[tex] 2x < 10\\\\ x < \frac{10}{2} \\\\x < 5 [/tex]
the solution is the interval ------> (-∞,5)
therefore
the answer is
[tex] x < 5 [/tex]
